two roses in one?

I would guess David Zlesak could explain better. Look through some old postings using the search function and I think he discussed it. The original was a Greek monster, part this, part that. Maybe Wiki has an article.

There are different layers of cells in a stem or root and sometimes the outer layer is genetically different from the one below it. Best example- variegated Sanseveria. If you try to grow it from leaf cuttings, all you get is green, because the new shoots all arise from the inner layer which is genetically green. But if you use the regular means of propagation by runners that come out of the whole plant, they are variegated.

Some people have seen things like that with roses when they propagate them in tissue culture and grow new plants from the callus that forms on pieces in culture.